Device for blocking exit of car from parking lot

ABSTRACT

An apparatus for blocking a parking vehicle from leaving, enabling a driver to confirm the locking board which is in the elevated state, and preventing the vehicle from leaving in an unauthorized manner. The apparatus does not employ any constitution for directly driving an auxiliary locking board using drive device, and the auxiliary locking board can be installed at a position remote from a main locking board.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus for blocking a parkingvehicle from leaving, used in a nonattended toll parking lot and, moreparticularly, to for preventing a parking vehicle from leaving in anunauthorized manner.

2. Background Art

In a nonattended toll parking lot, as shown in FIGS. 6 and 7, there hasheretofore been used a parking apparatus equipped with a parking feereceiving apparatus 1 and a leave-blocking apparatus 3 which locks aparking vehicle by means of a locking board 2.

In the leave-blocking apparatus 3 shown in FIG. 6, the locking board 2is disposed between the front tires and rear tires of a vehicle which isparking on a parking zone 4. In the leave-blocking apparatus 3 shown inFIG. 7, the locking board 2 is disposed at one end of the parking zone4, i.e., disposed on the inlet side from where the vehicle comes in andgoes out.

These apparatuses have been designed to block the vehicles from leavingby means of the locking board 2 that remains elevated unless a fee ispaid for parking the car.

The apparatuses 3 for blocking the parking vehicle from leaving shown inFIGS. 6 and 7 have their merits and demerits. So far, however, theapparatus shown in FIG. 6 has been widely and predominantly used.

The greatest reason is because when the locking board 2 is disposed onthe vehicle inlet side of the parking zone 4 as shown in FIG. 7, thedriver may overlook the elevated state, i.e., the locked state of thelocking board 2; and, accordingly, the driver may try to leave from theparking zone 4 in a state where the locking board 2 is elevated,therefore, much trouble occurs. When the locking board 2 is disposedbetween the front tires and the rear tires of the vehicle which isparking on the parking zone 4 as shown in FIG. 6, the driver is allowedto easily confirm the elevated state of the locking board 2 that islocated near the driver's seat; i.e., the driver is less likely to leavethe parking zone 4 in a state where the locking board 2 is elevated.Besides, even when the driver carelessly leaves the parking zone 4 inthe state where the locking board 2 is elevated or leaves at a momentwhen the locking board 2 starts elevated as the time enters into a timefor another charge, an elastic tire simply hits the locking board 2without damaging the vehicle and, hence, causing less trouble.

So far, therefore, the leave-blocking apparatus of the type shown inFIG. 6 has been much used. Accompanying an increase in the number oflarge four-wheel drive vehicles called RVs (recreational vehicles) inrecent years, however, an increasing number of vehicles are trying toleave in an unauthorized manner without paying the fee for the chargedtime.

The vehicle leaves in an unauthorized manner by treading and pushingdown the elevated locking board 2 with the tire or riding over thelocking board 2 when it cannot be pushed down. This can be easily doneby a vehicle having tires of a large diameter or by a vehicle having asmall road clearance for which the locking board is elevated by alimited amount.

The above-mentioned unauthorized leave can be better prevented by thesystem of FIG. 7 which closes the parking zone itself during the lockingtime than the system of FIG. 6 of which the locking board 2 is trod bythe tires.

As described above, however, the system of FIG. 7 invites the occurrenceof trouble, and makes it necessary to increase the depth of the parkingzone 4 so that the locking board 2 will not be concealed under thevehicle body. Therefore, this system cannot be installed in a narrowplace. In practice, therefore, the system of FIG. 6 has been muchemployed.

BACKGROUND OF THE INVENTION

The present invention was accomplished in order to solve theabove-mentioned problems inherent in the prior art, and its object is toprovide an apparatus for blocking a parking vehicle from leaving in anunauthorized manner without paying fees, enabling the state of thelocking portion to be easily confirmed, eliminating the occurrence oftrouble when the driver carelessly leaves or leaves while the lockingboard is being elevated, offering safety and high reliability.

An apparatus for blocking a parking vehicle from leaving of the presentinvention satisfies the following requirements (1) to (3):

(1) The driver is allowed to easily make sure the elevated state of thelocking board.

(2) Troubles occur little despite the driver carelessly leaves or leaveswhile the locking board is being elevated.

(3) Unauthorized leave without paying fees is prevented.

Therefore, a first aspect of the present invention is concerned with anapparatus for blocking a parking vehicle from leaving, comprising alocking portion for locking the parking vehicle, and a drive device forselectively driving the locking portion into a locked state in which thelocking portion is elevated after the vehicle has entered for parkingand into an unlocked state in which the locking portion is lowered,wherein the locking portion is constituted by a plurality of lockingboards.

Thus, the locking portion is constituted by a plurality of lockingboards. That is, at least one of the plurality of locking boards isinstalled at a position remote from the tire and at least one of them isinstalled at a position very close to the driver's seat, i.e., at aposition which will be run (passed) over by a tire. Accordingly, theelevated state of the locking board installed at a position run (passed)over by the tire can be easily confirmed by the driver, and troubleoccurs little despite the driver carelessly leaves or leaves while thelocking board is being elevated.

When the driver leaves in an unauthorized manner without paying fees,furthermore, the locking board installed at a position remote from thetire hits the vehicle body to prevent it from leaving.

In this case, the end of the locking board is formed to be downwardlybent so will not to bite into the lower part of the vehicle body and sowill not to damage the vehicle body.

According to a second aspect of the present invention, the lockingportion is constituted by a main locking board and an auxiliary lockingboard, the main locking board is interlocked to the drive device, and aninterlocking device is provided to interlock the main locking board andthe auxiliary locking board together so that the auxiliary locking boardis actuated to be in the locked state or the unlocked state when themain locking board is driven by the drive device to be in the lockedstate or the unlocked state. Then, in addition to the function of thefirst invention, it is made possible to install the auxiliary lockingboard at a position remote from the main locking board without the needof employing the constitution for directly driving the auxiliary lockingboard by the drive device.

In this case, the interlocking device is so constituted as to interlockthe main locking board and the auxiliary locking board together, so thatthe auxiliary locking board that has been actuated to be in the lockedstate can be actuated by the application of an external force to be inthe unlocked state when the main locking board is driven to be in thelocked state. Therefore, even when the auxiliary locking board islowered being trod by the tire, the operation of the main locking boardis not affected; i.e., the main locking board maintains the elevatedlocked state. This also prevents the vehicle from rising high andeffectively prevents the vehicle from leaving in an unauthorized mannerwithout paying fees.

Furthermore, the main locking board is disposed near the central portionof the parking zone with respect to the auxiliary locking board. Or, theauxiliary locking board has a lateral width larger than the lateralwidth of the main locking board. This makes it possible to prevent themain locking board from being intentionally trod by the tire and toprevent the vehicle from leaving in an unauthorized manner withoutpaying fees.

Moreover, if a detection device is provided to detect that the auxiliarylocking board has been pushed down to the unlocked position during thelocking period, any attempt to leave in an unauthorized manner bytreading the auxiliary locking board which is in the locked state can bedetected. By using a detection signal, an alarm may be produced, or thedetection signal may be output to an external unit to take a picture ofthe vehicle by means of a camera or the like.

If the driver dares to leave in an unauthorized manner, the auxiliarylocking board is lowered by the tire but the main locking board is notlowered. Therefore, the end of the main locking board may bite into thelower part of the vehicle body. However, the end of the main lockingboard which is at least downwardly bent does not bite into the lowerpart of the vehicle body and does not damage the vehicle body.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view illustrating an embodiment of an apparatus forblocking a parking vehicle from leaving according to the presentinvention;

FIG. 2 is a side sectional view of the above-mentioned embodiment,wherein the diagram (A) is a sectional view along the arrow A—A in FIG.1, the diagram (B) is a sectional view along the arrow B—B in FIG. 1,the diagram (C) is a sectional view along the arrow C—C in FIG. 1, andthe diagram (D) is a sectional view along the arrow D—D in FIG. 1;

FIG. 3 is a plan view illustrating another embodiment of the apparatusfor blocking a parking vehicle from leaving according to the presentinvention;

FIG. 4 is a side sectional view of the above-mentioned embodiment,wherein the diagram (A) is a sectional view along the arrow A—A in FIG.3, the diagram (B) is a sectional view along the arrow B—B in FIG. 3,the diagram (C) is a sectional view along the arrow C—C in FIG. 3, andthe diagram (D) is a sectional view along the arrow D—D in FIG. 3;

FIG. 5 is a diagram illustrating the whole constitution of a packingapparatus, wherein FIG. 5(A) is a plan view and FIG. 5(B) is a sideview;

FIG. 6 is a perspective view illustrating a conventional apparatus forblocking a parking vehicle from leaving; and

FIG. 7 is a perspective view illustrating another conventional apparatusfor blocking a parking vehicle from leaving.

EMBODIMENTS OF THE INVENTION

Embodiments of the present invention will now be described.

FIG. 5 illustrates the whole constitution of a parking apparatus whichis constituted by a parking fee receiving apparatus 10 and aleave-blocking apparatus 12 for locking a parking vehicle 11 installedin a parking zone 13, respectively.

FIGS. 1 and 2 illustrate in detail the constitution of theleave-blocking apparatus 12.

In these drawings, the leave-blocking apparatus 12 is constituted by avehicle-locking portion 14 and a drive portion 15.

The vehicle-locking portion 14 is provided with a base portion 16installed on the installation surface, a main locking board 17 supportedby the base portion 16, an auxiliary locking board 18 supported by thebase portion 16, and a locking board shaft 20. The main locking board 17is directly coupled to the locking board shaft 20 and the auxiliarylocking board 18 is coupled, via a torsion coil spring 19 to the lockingboard shaft 20.

Here, the auxiliary locking board 18 has a lateral width that is largerthan the lateral width of the main locking board 17. The main lockingboard 17 is disposed to the center of the parking zone 13 relative tothe auxiliary locking board 18.

The locking board shaft 20 is supported by the two end walls of the baseportion 16 such that its both ends are allowed to rotate.

The drive portion 15 includes a case 15A, a drive device constituted byan electric motor or the like contained in the case 15A and forselectively driving the main locking board 17 and the auxiliary lockingboard 18 to be in the elevated locked state and the lowered unlockedstate, and a control circuit portion which is a control device forcontrolling the drive device in response to a sensing signal output froma vehicle sensor that is not shown, so that the main locking board 17and the auxiliary locking board 18 are erected.

The drive device is constituted by a drive apparatus as represented bythe one disclosed in Japanese Patent No. 1568088. A crank 22 is attachedto a drive shaft 21 of the drive apparatus, the locking board shaft 20is coupled to the crank 22 via a link 23 and a crank 24, and the drivingforce of the drive apparatus is transmitted to the locking board shaft20 through drive shaft 21, crank 22, link 23 and crank 24, so that themain locking board 17 is driven and that the auxiliary locking board 18is driven being interlocked to the main locking board 17 through aninterlocking device which includes the torsion coil spring 19 as will bedescribed later.

In describing the above-mentioned constitution in further detail, themain locking board 17 is secured at its base end by welding to the outerperiphery of the locking board shaft 20 as a unitary structure togethertherewith.

The auxiliary locking board 18 has bearings 18A and 18B provided at thebase end on both sides thereof, the bearings 18A and 18B being supportedby the locking board shaft 20 so as to freely rotate. That is, theauxiliary locking board 18 is allowed to freely rotate about the lockingboard shaft 20.

A plate-like protruded portion 25 and a protruded portion 26 arefastened by screws (not shown) to a central portion of the locking boardshaft 20 between the bearings 18A and 18B of the auxiliary locking board18. The plate-like protruded portion 25 extends toward the end of theauxiliary locking board 18 from the outer peripheral surface of thelocking board shaft 20 and the protruded portion 26 extends from theouter peripheral surface of the locking board shaft 20 toward adirection opposite to the protruded portion 25.

A coil portion of the torsion coil spring 19 is fitted to a portion ofthe locking board shaft 20 at a position near the two protruded portions25, 26 between the bearings 18A and 18B of the auxiliary locking board18, and the one end of the torsion coil spring 19 contacts and Banchored to the lower surface of the auxiliary locking board 18 and theother end thereof contacts and is anchored to the lower surface of theprotruded portion 26.

The spring force of the torsion coil spring 19 acts toward the side toelevate the auxiliary locking board 18 to be in the locked state at alltimes.

The protruded portion 25 extends toward the side of the upper surface atthe central portion of the base end between the pair of bearings 18A and18B of the auxiliary locking board 18. The auxiliary locking board 18 isresiliently urged at all times by the torsion coil spring 19 toward thedirection of elevation, and is at rest at all times at a position whereit is in contact with the protruded portion 25. The rest position of theauxiliary locking board 18 is set so that it is nearly in parallel withthe main locking board 17 when no external force is exerted thereon.

The combination of the torsion coil spring 19 and the protruded portion25 correspond to the interlocking device of the present invention, andexhibits the following function.

When the drive shaft 21 is rotated to rotate the locking board shaft 20causing the main locking board 17 to rotate into the elevated lockedstate, the auxiliary locking board 18, which that is resiliently urgedby the torsion coil spring 19 at all times in the direction of elevationturns such that it is in contact with the protruded portion 25, whichtogether with the locking board shaft 20, and is elevated into thelocked state. In this case, the main locking board 17 is in the lockedstate accompanying the turn of the drive shaft 21, while the auxiliarylocking board 18 is in the pseudo locked state based on the spring forceof the torsion coil spring 19, and can be lowered by the external forcethat acts against the spring force of the torsion coil spring 19.

In the unlocked state where the main locking board 17 is turned and islowered, the auxiliary locking board 18 is turned and is lowered to bein the unlocked state while being held by the protruded portion 25formed on the locking board shaft 20.

In FIGS. 1 and 2, reference numeral 27 denotes a pressure sensor workingas a detection device for detecting that the auxiliary locking board 18has been pushed down to the unlocked position during the locking period.The pressure sensor 27 is installed on the upper surface of the baseportion 16 corresponding to a central portion of the lateral width ofthe auxiliary locking board 18.

When the auxiliary locking board 18 is pushed down, the pressure sensor27 is depressed by a rib 18C which is secured by welding to the lowersurface of the base end of the auxiliary locking board 18, and detects apressure and produces a detection signal.

In FIGS. 1 and 2, reference numeral 28 denotes a stopper for limitingthe elevated position of the main locking board 17 during the lockingperiod. The stopper 28 is engaged an engaging piece 17A provided at thebase end of the main locking board 17, so that the main locking board 17is halted at a predetermined elevated position.

Described below is the operation of the above-mentioned constitution.

The drive apparatus is rotated in one direction in response to afall-down signal from the control circuit portion. Then, the mainlocking board 17 is lowered and the auxiliary locking board 18 islowered, too, owing to the action of the above-mentioned interlockingdevice, and both of them are in the unlocked state.

As the vehicle sensor senses the vehicle, the drive apparatus is drivenby an instruction from the control circuit portion based on the sensingsignal so as to turn in a direction opposite to the direction ofrotation during the unlocking period. Accordingly, the main lockingboard 17 is elevated and the auxiliary locking board 18 is elevated,too, due to the action of the above-mentioned interlocking device, andboth of them are in the locked state.

The thus constituted leave-blocking apparatus 12 exhibits the followingeffects.

That is, by constructing the locking portion with a plurality of lockingboards, such as the main locking board 17 and the auxiliary lockingboard 18, at least one of the plurality of the locking boards, forexample, the main locking board 17 in this embodiment, can be installedat a position remote from the tire, and at least one of the plurality ofthe locking boards, for example, the auxiliary locking board 18 in thisembodiment can be installed at a position close to the driver's seat,i.e., at a position that will be run (passed) over by the tire.Therefore, despite the main locking board 17 being concealed just underthe vehicle 11 in FIG. 5, which renders it difficult to confirm thelocked state, the auxiliary locking board 18 installed at a positionthat will be run (passed) over by the tire makes it possible to easilyconfirm the elevated locked state of the locking boards 17 and 18 fromthe driver's seat which is close thereto. Besides, even when the drivercarelessly leaves or leaves while the locking boards 17 and 18 areelevated, little trouble occurs.

When the driver tries to leave in an unauthorized manner without payingfees, the main locking board 17 installed at a position remote from thetire hits the vehicle body to block the vehicle from leaving.

In this embodiment, the locking board is constituted by the main lockingboard 17 and the auxiliary locking board 18. The main locking board 17is interlocked with the drive apparatus. The main locking board 17 andthe auxiliary locking board 18 are interlocked together so that theauxiliary locking board 18 can be actuated into the locked state or theunlocked state when the main locking board 17 is driven by the driveapparatus into the locked state or the unlocked state. Therefore, thereis no need to directly drive the auxiliary locking board 18 by the driveapparatus, and the auxiliary locking board 18 can be easily installed ata position remote from the main locking board 17.

Moreover, the interlocking device is so constituted that the mainlocking board 17 and the auxiliary locking board 18 are interlockedtogether so that, when the main locking board 17 is driven to be in thelocked state, the auxiliary locking board 18 being in the locked statecan be actuated to be in the unlocked state upon the application of anexternal force. Therefore, when the auxiliary locking board 18 islowered and run over by the tire, the operation of the main lockingboard 17 is not affected; i.e., the locked state is maintained in whichthe main locking board 17 is elevated. This prevents the vehicle fromrising high and effectively prevents the vehicle from leaving in anunauthorized manner without paying fees.

Furthermore, the main locking board 17 is disposed near the center ofthe parking zone 13 in FIG. 5 relative to the auxiliary locking board18, and the auxiliary locking board 18 has a lateral width greater thanthe lateral width of the main locking board 17. This makes it possibleto prevent the main locking board 17 from being intentionally trod bythe tire and, hence, to effectively prevent the vehicle from leaving inan unauthorized manner without paying fees.

By providing the pressure sensor 27, which detects when the auxiliarylocking board 18 is in the locked state and is being pushed down as inthis embodiment, it is possible to detect when the auxiliary lockingboard 18 is in the unlocked state is being driven over pushed down, forexample, in an attempt to leave in an unauthorized manner. An alarm canthen be produced by utilizing the detection signal, or the detectionsignal can be output to the external unit to take a picture of thevehicle using a camera or the like.

Moreover, when the driver has attempted to leave carelessly or to leavewhile the locking boards 17 and 18 are being elevated, the end of theauxiliary locking board 18 comes into contact with the tire, which canbe noticed by the driver, making it possible to avoid troubles such asdamaging the vehicle body.

Next, another embodiment of the present invention will be described withreference to FIGS. 3 and 4.

According to this embodiment, the direction of the main locking board 17is opposite to that of the auxiliary locking board 18. To meet this, theinterlocking device has a different constitution.

That is, the vehicle-locking portion 14 is provided with the mainlocking board 17, auxiliary locking board 18, a first locking boardshaft 20A to which the main locking board 17 is directly coupled, and asecond locking board shaft 20B to which the auxiliary locking board 18is directly coupled.

The first locking board shaft 20A is coupled, via a joint 29, to thedrive shaft 21 of the drive apparatus contained in the drive portion 15,and a crank 30 is coupled to the first locking board shaft 20A.

On the other hand, a crank 31 is coupled to the second locking boardshaft 20B, the crank 31 being coupled to the crank 30 via a coil spring32.

Owing to the provision of the cranks 30, 31 and the coil spring 32, theinterlocking device according to the present invention is constituted inwhich the main locking board 17 and the auxiliary locking board 18 arecoupled together so that, when the main locking board 17 is driven to bein the locked state or the unlocked state, the auxiliary locking board18 is turned in a direction opposite to the main locking board 17 to bein the locked state or the unlocked state and that, when the mainlocking board 17 is driven to be in the locked state, the auxiliarylocking board 18 that has been actuated to be in the locked state can beactuated to be in the unlocked state upon the application of an externalforce.

That is, when the crank 30 is turned in the direction of arrow a in FIG.4(D) causing the main locking board 17 to elevate, the coil spring 32 ispulled and the crank 31 is turned in the direction of arrow b in FIG.4(D) which is opposite to that of the crank 30, there by causing theauxiliary locking board 18 to elevate.

In this case, the main locking board 17 is in the locked stateaccompanying the turn of the drive shaft 21, whereas the auxiliarylocking board 18 is in a pseudo locked state based on the spring forceof the coil spring 32 and can be lowered upon the application of anexternal force greater than the spring force of the coil spring 32.

Conversely, when the crank 30 is turned in the direction of arrow c inFIG. 4(D) causing the main locking board 17 to be lowered, the coilspring 32 is no longer in the tensioned state, and the crank 31 turns inthe direction of arrow d in FIG. 4(D) which is opposite to that of thecrank 30, and the auxiliary locking board 18 is lowered.

The above-mentioned embodiment exhibits the same function and effect asthose of the embodiment of FIGS. 1 and 2, and makes it possible toeffectively prevent any attempt to leave in an unauthorized mannerwithout paying fees.

In this embodiment as shown in FIG. 4(A), the end of the main lockingboard 17 is downwardly bent to avoid such troubles as damaging thevehicle body that occurs when the end of the main locking board 17 bitesinto the lower part of the vehicle body as a result of an attempt toleave in an unauthorized manner.

The constitution for downwardly bending the end of the main lockingboard 17 may also be applied even to the embodiment of FIGS. 1 and 2.

The end of the auxiliary locking board 18 may be downwardly bent, too.

This embodiment, too, is provided with the pressure sensor 27 fordetecting that the auxiliary locking board has been pushed down to theunlocked position during the locking period, and with a stopper 28, toexhibit the same function and effect as those of the embodiment of FIGS.1 and 2.

The directions of the main locking board 17 and of the auxiliary lockingboard 18 shown in FIGS. 3 and 4 may be reversed.

Industrial Applicability

According to the first aspect of the present invention as describedabove, the elevated state of the locking boards can be easily confirmedby a driver, and troubles occur little in case the driver has attemptedto carelessly leave or to leave while the locking boards are beingelevated. It is further possible to block the car from moving when it isattempted to leave in an unauthorized manner without paying fees.Accordingly it makes it possible to overcome a problem in that thelocking boards that are elevated cannot be easily recognized by thedriver, a problem in that troubles occur when the driver carelesslyleaves or leaves while the locking boards are being elevated, and aproblem related to any attempt to leave in an unauthorized mannerwithout paying fees.

According to the second aspect of the present invention, it is allowedto effectively prevent any attempt to leave in an unauthorized mannerwithout paying fees.

What is claimed is:
 1. An apparatus for blocking a parking vehicle fromleaving, comprising: a locking portion including a main locking boardand an auxiliary locking board, the main locking board being disposed ata central location such that a tire of the vehicle does not pass overthe main locking board; a drive element that selectively drives saidmain locking board into a locked state in which said main locking boardis elevated and into an unlocked state in which said main locking boardis lowered; and an interlocking element that couples the auxiliarylocking board to the main locking board such that, when the main lockingboard is elevated into the locked state, the interlocking elementelevates the auxiliary locking board and, when the main locking board islowered into the unlocked state, the interlocking element lowers theauxiliary locking board, wherein said main locking board is rigidlycoupled to said drive element.
 2. An apparatus for blocking a parkingvehicle from leaving according to claim 1, wherein at least a portion ofan end of said main locking board is downwardly bent.
 3. An apparatusfor blocking a parking vehicle from leaving as claimed in claim 1,wherein said auxiliary locking board can be lowered into the unlockedstate during the locked period.
 4. An apparatus for blocking a parkingvehicle from leaving as claimed in claim 1, wherein the auxiliarylocking board is adapted to be lowered into the unlocked state by anexternal force during the locked state.
 5. An apparatus for blocking aparking vehicle from leaving according to claim 1, wherein said mainlocking board is disposed near the central portion of the parking zonewith respect to said auxiliary locking board.
 6. An apparatus forblocking a parking vehicle from leaving according to claim 1, whereinsaid auxiliary locking board has a lateral width larger than the lateralwidth of the main locking board.
 7. An apparatus for blocking a parkingvehicle from leaving as claimed in claim 1, wherein, when a vehicle isparked over the blocking apparatus, the auxiliary locking board isvisible, whereas the main locking board is not visible.
 8. An apparatusfor blocking a parking vehicle from leaving as claimed in claim 1,wherein, when a vehicle leaves a parked state and backs up, theauxiliary locking board is lowered into an unlocked state, whereas themain locking board remains in the locked state.
 9. An apparatus forblocking a parking vehicle from leaving, comprising a locking portionfor locking the parking vehicle, and a drive means for selectivelydriving said locking portion into a locked state in which said lockingportion is elevated after said vehicle has entered for parking and intoan unlocked state in which aid locking portion is lowered, wherein: saidlocking portion is constituted by a main locking board and an auxiliarylocking board; said main locking board is interlocked to said drivemeans; an interlocking means is provided to interlock said main lockingboard and said auxiliary locking board together so that said auxiliarylocking board is actuated to be in the locked state or the unlockedstate when said main locking board is driven by said drive means to bein the locked state or the unlocked state; and said interlocking meansis so constituted as to interlock the main locking board and theauxiliary locking board together, so that said auxiliary locking boardthat is being in the locked state can be actuated by an external forceto be in the unlocked state when said main locking board is driving tobe in the locked state.
 10. An apparatus for blocking a parking vehiclefrom leaving, comprising a locking portion for locking the parkingvehicle, and a drive means for selectively driving said locking portioninto a locked state in which said locking portion is elevated after saidvehicle has entered for parking and into an unlocked state in which aidlocking portion is lowered, wherein: said locking portion is constitutedby a main locking board and an auxiliary locking board; said mainlocking board is interlocked to said drive means; an interlocking meansis provided to interlock said main locking board and said auxiliarylocking board together so that said auxiliary locking board is actuatedto be in the locked state or the unlocked state when said main lockingboard is driven by said drive means to be in the locked state or theunlocked state; and wherein said auxiliary locking board can be pusheddown to the unlocked state during the locking period.